Cambridge Progression Test Stage 4 Science 2023 Paper 1 With Mark Scheme
1. Earth and space: layers of Earth (core, mantle, crust), Solar System components (planets, Sun, other objects), model inaccuracies, examples of planets
2. Animals and skeletons: grouping vertebrates vs. invertebrates, external skeleton (exoskeleton), skeleton functions (movement, protection)
3. Electricity and materials: identifying conductors and insulators, copper as conductor, energy conversion in home devices (movement, sound, light, heat)
4. Light and reflection: ray diagram showing light direction and reflection from mirror, light travels in straight lines, reflection principle
5. Changes of state: melting of ice (solid to liquid), reverse by freezing, matter made of particles, chemical reaction evidence (gas production, new substance)
6. Health and disease: measles infection data, effect of vaccination drop, medicine safety cap importance, infectious disease prevention via vaccines

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